US9225449B2 - Performing a handover in a heterogeneous wireless network - Google Patents

Performing a handover in a heterogeneous wireless network Download PDF

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Publication number
US9225449B2
US9225449B2 US13/756,665 US201313756665A US9225449B2 US 9225449 B2 US9225449 B2 US 9225449B2 US 201313756665 A US201313756665 A US 201313756665A US 9225449 B2 US9225449 B2 US 9225449B2
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target
serving cell
anchor serving
cell
anchor
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US20130301439A1 (en
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Youn Hyoung Heo
Mo-Han Fong
Yujian Zhang
Jong-Kae Fwu
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Apple Inc
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Intel Corp
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Priority to US13/756,665 priority Critical patent/US9225449B2/en
Application filed by Intel Corp filed Critical Intel Corp
Priority to EP13788093.6A priority patent/EP2848040B1/de
Priority to JP2015511782A priority patent/JP6017024B2/ja
Priority to PCT/US2013/040644 priority patent/WO2013170209A1/en
Priority to CN201380024695.0A priority patent/CN104285471B/zh
Assigned to INTEL CORPORATION reassignment INTEL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEO, YOUN HYOUNG, ZHANG, YUJIAN, FWU, JONG-KAE, FONG, MO-HAN
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Definitions

  • the macro node can be used for basic coverage.
  • the low power nodes can be used to fill coverage holes within a macro node's geographic coverage area (i.e. cell) and at the boundaries between the macro nodes' coverage areas.
  • Low power nodes can also be used to improve capacity in high use areas and improve indoor coverage where building structures impede signal transmission.
  • FIG. 2 illustrates a block diagram of third generation partnership project (3GPP) wireless network
  • FIG. 3 illustrates a flow diagram of a change in transmission point for a user equipment (UE) in accordance with an example
  • the scrambling sequence of a CSI-RS or a DMRS of a Physical Downlink Shared Channel (PDSCH) or an Enhanced Physical Downlink Control Channel (E-PDCCH) can be initialized with an RRC configured parameter instead of a cell ID of a specific node or cell.
  • an RRC configured UE specific parameter can be used instead of a physical cell ID of a specific node.
  • a virtual cell identity can be configured for the PUSCH, PUCCH or SRS.
  • a transmission point (TP) change may be used to inform the UE of the change.
  • a transmission point is a cell configured to transmit a signal.
  • a reception point (RP) is a cell configured to receive a signal.
  • the TP and RP are typically in the same cell. However, it is possible for the TP and RP to be located in different cells. In this case, the UE may need to know that a change in transmission point has occurred to apply a rate matching of PDSCH data around CRS resource elements (REs). Otherwise, a change in TP can be transparent to the UE.
  • packet data transmission 312 and reception 314 can occur between the UE and the target TP.
  • the target TP can forward 316 the received packet to the anchor serving cell, which delivers the received packet to the serving gateway (S-GW).
  • the anchor serving cell delivers buffered packets to the target TP and the target TP buffers packets from the anchor serving cell until the UE is prepared to receive the signal from the target TP. If the UE is ready to receive the signal from the target TP, the target TP transmits it to the UE via an air interface.
  • the method 700 can also include sending at least one of a master information block (MIB) and a system information block (SIB) from the anchor serving cell to the UE via the target TP.
  • MIB master information block
  • SIB system information block
  • the MIB/SIB information can be sent from an anchor cell via an X2 connection to the target TP. If the RRC layer is located in the target TP, the UE can receive the target TP's MIB/SIB from the target TP directly.
  • the UE can also have circuitry that is configured to send channel measurements made by the UE using channel state information reference signals (CSI-RS) to enable handover to occur for the UE from the anchor serving cell to the target TP while continuing to use a radio resource control (RRC) layer configured by the anchor serving cell.
  • CSI-RS channel state information reference signals
  • RRC radio resource control
  • Various techniques, or certain aspects or portions thereof, may take the form of program code (i.e., instructions) embodied in tangible media, such as floppy diskettes, CD-ROMs, hard drives, non-transitory computer readable storage medium, or any other machine-readable storage medium wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the various techniques.
  • the computing device may include a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device.

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  • Computer Networks & Wireless Communication (AREA)
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  • Quality & Reliability (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Computer Hardware Design (AREA)
  • Mobile Radio Communication Systems (AREA)
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US13/756,665 US9225449B2 (en) 2012-05-11 2013-02-01 Performing a handover in a heterogeneous wireless network
JP2015511782A JP6017024B2 (ja) 2012-05-11 2013-05-10 異種無線ネットワークにおけるハンドオーバーの実行
PCT/US2013/040644 WO2013170209A1 (en) 2012-05-11 2013-05-10 Performing a handover in a heterogeneous wireless network
CN201380024695.0A CN104285471B (zh) 2012-05-11 2013-05-10 在异构无线网络中执行切换
EP13788093.6A EP2848040B1 (de) 2012-05-11 2013-05-10 Durchführung einer weiterreichung in einem heterogenen drahtlosen netzwerk

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